Fuse device



J. SACHS FUSE DEVICE April 25, 1933.

3 Sheets-Sheet 1 Filed June 10 1932 Jana 50h 555225 m bf: arn y J. SACHSFUSE DEVICE A ril 25, 1933.

Fglled June 10, 1952' 3 Sheets-Sheet 2 April 25,1933. J. SACHS 1,905,004

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Patented Apr. 25, 1933 UNITED STATES JOSEPH SLACHS, OF WEST HARTFORD,CONNECTICUT FUSE DEVICE Application filed June 10,

The principal object of the present inven tion is to provide a fusedevice, and particularly an insulating fuse carrying base, which is soconstructed that it may be connected and used in a large variety ofways, either alone or in conjunction withother similar devices or withdifi'erent electrical devices. In accordance with the invention there isprovided an insulating fuse carrying base so 1 constructed that wireterminals, connecting conductors, bus bars and the like may be connectedwith fuse contacts on the base in many different ways. i

In the accompanying drawings I have shown one form of insulating baseembodying the invention and I have also shown the sald base combinedwith several different arrangements of conductors so as to be adaptedfor several different circuit arrangements. It will be understood thatthe drawings are.

intended for illustrative purposes only and that there may be widedeparture therefrom, particularly as concerns the arrangements ofelectrical conducting parts on or in association with the base. Thedrawings are not to be relied upon as defining or limiting the scope ofthe invention, the claims forming a part of this specification beingrelied upon for that purpose.

Of the drawings: Fig. 1 ,is a front view of an insulating fuse baseembodying the invention.

Fig. 2 is a combined side andsectional view of the base, the sectionbeing taken along the line 22- of Fig. 1.

Fig. 3 is a combined bottom and sectional view of the base, the sectionbeing taken along the line 3-3 of Fig. 1.

Fig. 4 is a fragmentary sectional view taken along the line 4-4 of Fig.1 and showing in place on the basea fuse contact, a conducting strap anda wire terminal on thestrap.

Fig. 5 is a fragmentary sectional view taken along the line 5'-5 of Fig.1 and showing in place a fuse contact, a transverse conductor, and aconnector between the said fuse contact and conductor.

Fig. 6 is a front view of the complete base with one arrangement ofelectrical con- 1932. Serial No. 616,405.

ductors thereon, certain parts of the base and the conductors beingbroken away in order that other parts may be more clearly shown.

Fig. 7 is a front view showing the .complete base with anotherarrangement of electrical conductors associated therewith, theseconductors including vertical bus bars.

Fig. 8 is a vertical sectional view taken along the line 88 of Fig. 7.

Figs. 9 to 17 are diagrammatic views of 69 the base combined withvarious conductors to provide various circuit arrangements.

Fig. 18 is a diagrammatic view showing two bases, one above the otherand connected by means of vertical bus bars.

Figs. 19 and 20 are diagrammatic views each showing two bases arrangedside by side and connected by means of transverse conductors.

The insulating fuse carrying base 1 to which the'invention particularlyrelates is shown separately in Figs. 1, 2 and 3. The base is adapted tobe connected to a rear supporting wall, such as the rear wall of anenclosing box, by means of screws extending through holes 2, 2'. Thesaid base 1 has a forward facing portion adapted for the mountin thereonof at least one pair of spaced use clips or contacts adapted forreceiving cartridgefuses. Preferably and as shown provision is made formounting two similar pairs of such contacts, the contacts of the saidpairs being held in place by means of screws extending through the holes3, i and 3', i".

The base 1 is provided with a forward projecting barrier 5 whichpreferably completely surrounds the fuse carrying portion of the base atthe sides thereof and at the top and bottom. Preferably there isassociated with the barrier a partition 6 which is positioned betweenthe positions of the fuse contacts of the two pairs. Adjacent theposition of each fuse contact there is at least one opening through thebarrier 5 and preferably adjacent the fposition of at least one of thefuse contacts 0 each pair there are two such openings. Preferably and asshown there are two'openings adjacent each fuse contact position. Asshown the top wall of 1 ap car.

vertical bus the barrier 5 is provided with openings 7 and 7' adjacentthe positions for the upper fuse contacts. Similarly the bottom wall ofthe barrier 5 is provided with openings 8, 8 adj acent the positions forthe bottom contacts. The right side wall of the barrier 5 is providedwith openings 9 and 10 adjacent the positions for the right handcontacts. 'Similarly the left side wall of the barrier 5 is providedwith openings 9' and 10 adjacent the ositions for the left hand fusecontacts. To acilitate molding, the several openings in the barrier 5are formed by providing deep recesses which extend forward from the backof the base as clearly shown in Figs. 2 and 3.

Adjacent the respective openings 9, 9 and 10, 10' in the side walls ofthe barrier 5 are recesses 11,11 and 12,12. These recesses are for thepurpose of providing clearance for screws which are used in connectionwith conductor straps on the base as will presently e base 1 ispreferably provided at its rear face with one or more vertical groovesada ted to receive one or more vertically extending bus bars. The baseas shown has two vertical grooves 13 and 13 immediately bebind thepositions for the fuse "contacts of the respective pairs and there ispreferably also a. third central vertical groove 14 for a neutral busbar. A hole 15 is provided for a screw adapted to hold a bus bar inplace in the groove 14.

In order that any one of the fuse contacts may be electrically connectedwith a bus bar m the corresponding groove 13 or 13' there are providedadjacent the respective positions of the fuse contacts openingsextending hrough the base from front to rear thereoi and each ada ted toreceive a suitable connectin con uctor. Adjacent the positions for toeupper fuse contacts are openings 16, i6, and adjacent the positions forthe lower fuse contacts are openings 17, When the aforesaid openings 7,7" and 8, 8 through the barrier walls are formed b means o1 deeprecesses extending from the was of the has as shown and described,

recesses, or at least the inner portions thereof, may serve as the said0 enings extending through the base from out to rear thereof. In otherwords, as will be readi apparent from an inspection of Fig. 2, frontportions of the recesses constitute openm 's' through the barrier wallsand inner portions, that is, the upper and ower portions of the saidrecesses, constithe said recesses from front to rear. 1 s constructionnot only facilitates moldof the bases but also facilitates thepositioning of connecting conductors in the said openings 16, 16 and 17,17 as will presently appear.

in addition to the grooves 13, 13' andle bars, or as an alternativearrangement, the base may be provided with horizontal or transversegrooves 18 and 19 adapted to receive horizontally extending bus bars orconnectors. and 19 are so located that the upper oove 18 is in registerwith the positions or the upper fuse contacts and the lower groove 19 isin register with the positions for the lower fuse contacts.

In Fig. 4 I have shown the manner in which a conducting strap 20 mayextend through one of the barrier openings and into engagement with afuse contact mounted on the base 1. The strap 20 as shown in Fig. 4extends through the barrier opening 9 and engages at its inner end withafuse contact, the'said strap and fuse contact being both held in placeby a screw 28 extending through the hole 3 in the base. At the outer endof the strap 20 is a wire terminal 21 held in place by a screw 22 with anut thereon. 'The aforesaid recess 11 in the base pro vides clearancefor the head of the screw 22. The said recess 11 is made deep enoughtoalso provide clearance for a screw reversed in position from that shownand having the head at the front.

In Fig. 5 I have shown a U-shaped conductor 23 providing a connectionbetween a fuse clip on the base and a transverse conductor in the uppertransverse groove 18. In" lieu of the screw 28 shown in Fig. 4 there isprovided a longer screw 24 which extends through the transverseconductor, through the opening in the rear leg of the conductinconnector 23, through the fuse contact an into the threaded front leg ofthe said conductor 23. A spacing washer 25 may be provided between thebase and the fuse contact. It will be observed that the screw 24 servesto hold all of the said conducting parts in place and that the saidconductor 23 provides an eflicient electrical connection between the busbar and the fuse contact.

The connecting conductor 23 and screw 24 as shown in Fig. 5 may also beused to connect a fuse contact with a vertical bus bar in one of thegrooves 13 or 13'. It will be observed that the positions of the saidgrooves are such that the construction as shown in Fig. 5 may be usedwithout any change whatsoever, other than the positioning of the bus barvertically instead of horizontally. This is shown in detail in Fig. 8.

The base 1 is normally provided with two pairs of fuse contacts 26, 27and 26, 27, these being held by screws 28, 29 and 28, 29 locatedrespective y in the holes 3, 4 and 3', 4'. Various arrangements ofconductors and wire terminals may be provided in association with thesaid fuse contacts, and in order that the invention may be fullyunderstood I have shown in detail two representative arran ements. Oneof these is shown in Fig. 6 an the other in Figs. 7 and 8.

In Fig. 6 I have also shown conducting straps 20 and 20 in place in theopenings 9 and 9',- these straps carrying wire terminals 21 and 21'.Conducting stra s 30 and 30 are in place in the openings and 7 thesebein provided with wire terminals 31 and 31. he straps 20 and 30both/engage the fuse contact 26, being held by the before-mentionedscrew 28. As illustrated the strap 20 is behind the fuse clip and thestrap 30 is in front of the fuse clip. Similarly the stra s 20' and 30engage the fuse contact 26', ing held by the screw 28. Conducting straps32 and 32'- are in place in the openings 8 and 8', these being providedwith wire terminals 33, 33. The straps 32, 32' respectively engage thefuse contacts 27, 27 and are held respectively by the screws 29, 29'.

In Figs. 7 and 8 I have shown vertical bus bars 34 and 3 1' occupyingthe grooves 13 and 13, and I have also shown a bus bar 35 occupying thegroove 14 and held in place by a screw 36 in the hole 15. The fusecontacts 26 and 26 are connected with the respective bus bar 34 and 34'by means of U shaped connectors 23 and 23', these being held in place bymeans. of screws 24.- and 24'. The construction and mounting of theconnectors 23 and 23 have already been described in connection with Fig.5. Conducting straps 37, 3? are positioned inthe barrier openings ltl,10', these being connected with the fuse contacts 27, 27 and beingprovided with wire terminals 38, 38'.

A fuse device incorporating the invention, in whatever way connected andarranged, is well adapted to be mounted in an enclosing cabinet or boxas illustrated for instance in Fig. 8. The base is secured to the rearwall 39 of the box by means of screws extending 1 through the holes 2,2. The barrier 5 and partition 6 may extend into engagement with or atleast into close proximity to the front cover 40 of the box. The saidcover 40 may have an opening 41 therein of such size as to permit accessto the fuse contacts.

on the base 1. Thismakes it possible for the fuses to be at in place orremoved without opening t e said cover. The opening 41 in the cover 420may be normally closed by a hinged flap 42.

While for the sake of convenience I have applied different referencecharacters to the several conducting straps for connecting the fusecontacts with wire terminals it will be understood that all of the saidstraps are or may be of the same shape and size so that they may be usedinterchan eably. The U- shaped connectors for provi ing connectionsbetween the fuse contacts and rear bus bars or conductors may also be ofthe same shape and size so that they can be used interchan eably. Itwill thus be apparent that with only two styles of conductors or.connectors the base 1 can be provided with a wide variety of circuitarrangements.

In Figs. 9 to 14 I have illustrated diagrammatically some of the variousarrangements of conductor straps and wire terminals which may beprovided. In each instance the line or service wires are indicated by Sor S and the load wires are indicated by L. Fig. 13 will be recognizedas showing diagrammatically the construction already shown in detail inFig. 6.

In Figs. 15 to 17 I have shown some of the various arrangements that maybe provided using vertical bus bars 34:, 34'. Fig. 15 will be recognizedas showing diagrammatically the arrangement which has already been shownin detail in Figs. 7 and 8.

In Fig. 18 I' have shown an arrangement wherein there are two bases 1, 1arranged one above the other and both associated with the same verticalbus bars 34, 34 and 35. It will be observed thatthe load circuit L isconnected through the upper fuses, and that the load. circuit L isconnected not only through the upper fuses but also through the aredirectly connected .bya transverse con ductor 44 extending through thebarrier openings 10' and 10 in the two bases.

In Fig. 20 I have shown an arrangement 1 somewhat similar to that shownin Fig. 19. In this case, however, the upper fuse contacts of the twoouter pairs are connected by a transverse connector 45 located in theupper groove 18 of the two bases and connected with the respectivecontacts by means of U-shaped connectors 23, 23. The two lower fusecontacts of the inner pairs are connected by means of a transverseconnector 46 located in the lower groove 19 of the two bases andconnected with the respective fuse contacts by means of U-shapedconnectors 23, 23'.

What I claim is:

1. A fuse block having a forward facing portion adapted for the mountingthereon of at least one pair of spaced fuse contacts and also having aforward projecting barrier at the ends and at both sides of the said portion, the said barrier having at least one openas to be adapted toreceive a conductor c nectible at its inner end with a fuse contact andconnectible at its outer end with a wire terminal or other electrical apurtenance.

2. A fuse block having a orward facing portion adapted for the mountingthereon of two similar pairs of spaced fuse contacts and also having aforward projecting barrier at the ends and at both sides of the saidportion, the said barrier having two openings in each end wall and atleast one opening in each side wall and each said opening being inregister with a fuse contact position so as to be adapted to receive aconductor connectible at its inner end with a fuse contact andconnectible at its outer end with a wire terminal or other electrical apurtenance.

3. A fuse block having a orward facing portion adapted for the mountingthereon of two similar pairs of spaced fuse contacts and also having aforward projecting barrier at the ends and at both sidesof the saidportion, the said barrier having two openings in each end wall and twoopenings in each side wall and each said opening being, in register witha fuse contact position so as to be adapted to receive a conductorconnectible at its inner end with a fuse contact and connectible at itsouter end with a wire terminal or other electrical appurtenance.

A fuse block having a bus bar groove in its rear face and having aforward facing portion adapted for the mounting thereon of'at least onepair of lon itudinally spaced fuse contacts and provided with an openingfrom front to rear adjacent each fuse position for the reception of aconductor connectible at the front with the corresponding fuse contactand connectible at the rear with the bus bar, the said block also havingaforward projecting barrier at the ends and at both sides of the saidfuse mounting portion, which barrier has at least one opening in eachend wall and two openings in each side wall with each said opening inregister with a fuse contact position so as to be adapted to receive aconductor connectible at its inner end with a fuse contact andconnectible at its outer end with a wire terminal or other electricalappur'tenance.

5. A fuse block having two parallel longitudinal bus bar grooves in itsrear face and having a forward facing portion adapted for the mountingthereon of two pairs of longitudinally spaced fuse contacts and providedwith an opening from front to rear adjacent each fuse position for thereception of conductor connectible at the front with the correspondingfuse contact and connectible at the rear with the corresponding bus bar,the said block also having a forward projecting barrier at the ends andat both sides of the said fuse mounting portion, which barrier has twoopenings in each end wall and two openings in each side wall with eachsaid opening in register with a fuse contact position so as to beadapted to receive a conductor connectible at its inner end with a fusecontact and connectible at its outer end with a wire terminal or otherelectrical appurtenance.

6. A fuse block having two parallel transverse bus bar grooves in itsrear face and having a forward facing portion adapted for the mountingthereon of two pairs of Iongitudinally spaced fuse contacts and providedwith an opening from front to rear adjacent each fuse position for thereception of a conductor connectible at the front with the correspondingfuse contact and connectible at the rear with the corresponding bus bar,the said block also having a forward projecting barrier at the ends andat both sides of the said fuse mounting portion, which barrier has atleast one opening in register with each fuse contact position andadapted to receive a conductor connectible at its inner end with a fusecontact and connectible at its outer end with a wire terminal or otherelectrical appurtenance.

7 A fuse block having two parallel transverse bus bar grooves in itsrear face and having a forward facing portion adapted for the mountingthereon of two pairs of longitudinally spaced fuse contacts and providedwith an opening from front to rear adjacent each fuse position for thereception of a conductor connectible at the front with the correspondingfuse contact and connectible at the rear with the corresponding bus bar,the said block also having a forward projecting barrier at the ends andat both sides of the said fuse mounting portion, which barrier has twoopenings in each end wall and two openings in each side wall and eachsaid opening being in register with a fuse contact position so as to beadapted to receive a conductor connectible at its inner end with a fusecontact and connectible at its outer end with a wire terminal or otherelectrical appurtenance.

' responding bus bar.

9. A fuse block having in its rear face two parallel longitudinal busbar grooves and two parallel transverse bus bar grooves and having aforward facing portion adapted for the mounting thereon of two pairs oflongitudinally spaced fuse contacts and provided with two openings fromfront to rear adjacent each fuse position and each adapted for thereception of a conductor connectible at the front with the correspondingfuse contact and connectible at the rear with the corresponding bus bar,the said block also having a forward projectin barrier at the ends andat both sides 0 the said fuse mounting portion, which barrier has atleast one opening in register with each fuse contact position andadapted to receive a conductor connectibleat its inner end with a fusecontact and connectible at its outer end with a wire terminal or otherelectrical appurtenance.

10. A fuse block assembly comprising in combination, an insulating blockhaving a forward facin fuse mounting portion and also having a forwardprojecting barrier at the ends and at both sides ofthe said portion, thesaid barrier having at least one opening in each end wall and twoopenings in each side wall, a pair of spaced fuse contacts on the saidfuse mounting portion of the block with each contact in register withtwo of the said openings in the barrier, and two interchangeablyositionable conductors adapted to engage the respective fuse contactsand each adapted to extend through either of the said barrier openingsadjacent the corres onding contact. I

11. A use block assembly comprising in combination, an insulating blockhaving a forward facing fuse mounting portion and also having a forwardprojecting barrier at the ends and at both sides of the said p0rtion,the said barrier having at least one opening in each end wall and twoopenings in each side wall, a pair of spaced fuse contacts on the saidfuse mounting portion of theblock with each contact in register with twoof the said openings in the barrier, two conductors connected with onefuse-contact and extending through the barrier o nings registering withthe said contact, an a conductor connected with the other fuse contactand extending through one of the barrier ppelnings registering with thesaid other con- 12. A fuse block assembly comprising in combination, aninsulating block having a bus bar groove in its rear face and having aforwar facing fuse mounting portion provided with an opening from frontto rear communicatin with the said groove, the said block also havlng aforward projecting barrier at the ends and at both sides of the saidportion, the said barrier having at least one openin in each end walland two openings in eaclilsl e wall, a pair of spaced fuse contacts on te and fuse mountin portion of the block with each contact in registerwith two of the said openings in the barrier, and with one of themadjacent the said opening from front to rear, a bus bar in the saidgroove, a conductor extending through the opening from front to rear andconnecting one fuse con-

